What are the applications of spherical lenses?

Spherical lenses are used to focus, form images, and collimate or expand light. Spherical lens shapes are divided into convex lens, flat convex lens, double concave lens, flat concave lens, convex lens, glued lens, etc., according to customer drawings or sample processing customized to meet different customer application needs.

Flat convex spherical lenses are used for converging or focusing light, and for collimating point sources. The best cost-effective alternative to a positive lens when used in an infinite conjugate ratio, collimating light incident onto a convex surface. Reduced spherical aberrations and near zero coma when used off-axis.

Double convex spherical lenses are used for 1:1 imaging, beam extenders, and beam relay applications. Good positive lens for virtual imaging of real objects and positive conjugate image ratios from about 0.2 to 5 (depending on wavelength). It can also be used for focusing applications with lower F-numbers. When used in unit conjugation ratios, it behaves like an optimal single lens.

Plano-concave spherical lenses are used to expand light or increase the focal length in an optical system, or to balance the aberrations of other lenses in the system. Negative focal length diverges the collimated incident light. Spherical aberrations and comas are reduced when collimated light is incident on the concave side at an infinite conjugate ratio.

Double-concave spherical lenses are used to scatter or expand light in laser beam expanders, optical character readers, viewers, and projection systems. Negative focal length; Form a virtual image that can be seen through the lens.